Question for Zambian Consulate in Lilongwe, Malawi

1) Can we apply visit visa in Malawi to visit in Zambia?
2) What kind of documents we need to provide
3) How long does it take for issuing visit visa
4) what is the expenses for applying visit visa
5) What is the duration and validity of visit visa.
6) Note- The people the have work permit in Malawi if they want visit Zambai by road and stay here 15days what they have to do, they all are Bangladeshi citizen.